Pet shop proprietor Jack West is intimidated by a killer after he witnesses a murder. Because he values his life, West refuses to help police. Detectives also find 'Skinny' Jones reluctant to help after an attempt has been made on his life. The killer is 'Drummy' Taylor, a hard case without emotions, but very cunning. He is violent, and kills without a qualm. He evades capture by terrorising those who can incriminate him - but he meets his match in Sen. Det. Kelly. Notes: Originally scheduled in Melbourne for 5/2/74, the timeslot was exchanged with ep. 411, 'A Crime Against Nature', to allow the latter to be brought forward for screening in a special 9:00 PM timeslot.